def EP_r(rk_r):
WK_r = []
EP = bm.gen(32, 64)
rk_r = tr.BinList2BinArray(tr.HexStr2BinList(tr.Int2HexStr(rk_r)))
WK = tr.BinList2HexStr(tr.BinArray2BinList(bm.mlti(rk_r, EP)))
for i in xrange(0, len(WK), 2):
WK_r.append(WK[i] + WK[i + 1])
return WK_r
def E_r(x):
s = ''
for i in xrange(len(x)):
A = bm.gen(4, 8)
b = bm.gen(1, 8)
x_i = tr.BinList2BinArray(tr.HexStr2BinList(x[i], 4))
y_i = xor(tr.BinList2HexStr(tr.BinArray2BinList(bm.mlti(x_i, A))),
tr.BinList2HexStr(tr.BinArray2BinList(b)))
s += y_i
return s
def R(b):
R = bm.gen(32, 32)
return tr.BinList2HexStr(
tr.BinArray2BinList(
bm.mlti(tr.BinList2BinArray(tr.HexStr2BinList(b)), R)))
def wb_crypt(pt):
text = split_pt(pt, BLOCK_SIZE)
cipher_text = 'ct: '
plain_text = 'pt: '
for each in text:
# each: 128 bit
x = [trans(each[i:i + BLOCK_SIZE / 4]) for i in xrange(0, BLOCK_SIZE, BLOCK_SIZE / 4)]
# x[i]: '61626364' -> 'abcd'
print 'Plain text block: ' + ''.join(x)
print 'Encryption start.'
for r in xrange(32):
X_r = xor(xor(x[1], x[2]), x[3])
for i in xrange(8):
X_r = X_r[0:i] + tr.Int2HexStr(or_table[r][i][tr.HexStr2Int(X_r[i])], 1) + X_r[i + 1:]
# X_r_0 = x[0]
X_r_0 = xor(tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(pr_table[r][0], tr.BinList2BinArray(tr.HexStr2BinList(x[0]))))),
tr.BinList2HexStr(tr.BinArray2BinList(pr_table[r][1])))
y = '00000000'
for i in xrange(8):
y = xor(tr.BinList2HexStr(tr.BinArray2BinList(LUTable[r][i][tr.HexStr2Int(X_r[i])])), y)
new_x = xor(X_r_0, y)
new_x = xor(
tr.BinList2HexStr(tr.BinArray2BinList(bm.mlti(bm.inv(pr_table[r][0]), pr_table[r][1]))),
tr.BinList2HexStr(tr.BinArray2BinList(
bm.mlti(bm.inv(pr_table[r][0]), tr.BinList2BinArray(tr.HexStr2BinList(new_x))))))
x = x[1:] + [new_x]
print 'Round ' + str(r) + ': ' + ''.join(x)
cipher_text += reduce(lambda a, b: a + b, map(inverse, x[-1::-1]))
x = [x[3], x[2], x[1], x[0]]
print 'Cipher text block: ' + ''.join(x)
print 'Decryption start.'
for r in xrange(32):
X_r = xor(xor(x[1], x[2]), x[3])
for i in xrange(8):
X_r = X_r[0:i] + tr.Int2HexStr(or_table[31 - r][i][tr.HexStr2Int(X_r[i])], 1) + X_r[i + 1:]
# X_r_0 = x[0]
X_r_0 = xor(tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(pr_table[31 - r][0], tr.BinList2BinArray(tr.HexStr2BinList(x[0]))))),
tr.BinList2HexStr(tr.BinArray2BinList(pr_table[31 - r][1])))
y = '00000000'
for i in xrange(8):
y = xor(tr.BinList2HexStr(tr.BinArray2BinList(LUTable[31 - r][i][tr.HexStr2Int(X_r[i])])), y)
new_x = xor(X_r_0, y)
new_x = xor(
tr.BinList2HexStr(tr.BinArray2BinList(bm.mlti(bm.inv(pr_table[31 - r][0]), pr_table[31 - r][1]))),
tr.BinList2HexStr(tr.BinArray2BinList(
bm.mlti(bm.inv(pr_table[31 - r][0]), tr.BinList2BinArray(tr.HexStr2BinList(new_x))))))
x = x[1:] + [new_x]
print 'Round ' + str(r) + ': ' + ''.join(x)
print '----------------------------------------------------------------------'
plain_text += reduce(lambda a, b: a + b, map(inverse, x[-1::-1]))
print plain_text
print cipher_text
def A_4(x):
global r
x = tr.BinList2BinArray(tr.HexStr2BinList(x))
return xor(tr.BinList2HexStr(tr.BinArray2BinList(bm.mlti(x, A[r][3]))),
tr.BinList2HexStr(tr.BinArray2BinList(b[r][3])))
def wb_crypt(plain_text):
# main function, take string as input and return encrypted text,
global r
text = split_pt(plain_text)
cipher_text = ''
for each in text:
x = [trans(each[i:i + line / 4]) for i in xrange(0, line, line / 4)]
print 'Plain text block: ' + ''.join(x)
print 'Encryption start: '
print 'Pre-procession start: '
x[0] = xor(
tr.BinList2HexStr(
tr.BinArray2BinList(
bm.mlti(tr.BinList2BinArray(tr.HexStr2BinList(x[0])),
bm.inv(A[0][2])))),
tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(b[0][2], bm.inv(A[0][2])))))
x[1] = xor(
tr.BinList2HexStr(
tr.BinArray2BinList(
bm.mlti(tr.BinList2BinArray(tr.HexStr2BinList(x[1])),
bm.inv(A[0][0])))),
tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(b[0][0], bm.inv(A[0][0])))))
x[2] = xor(
tr.BinList2HexStr(
tr.BinArray2BinList(
bm.mlti(tr.BinList2BinArray(tr.HexStr2BinList(x[2])),
bm.inv(A[0][0])))),
tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(b[0][0], bm.inv(A[0][0])))))
x[3] = xor(
tr.BinList2HexStr(
tr.BinArray2BinList(
bm.mlti(tr.BinList2BinArray(tr.HexStr2BinList(x[3])),
bm.inv(A[0][0])))),
tr.BinList2HexStr(
tr.BinArray2BinList(bm.mlti(b[0][0], bm.inv(A[0][0])))))
print 'Pre-processed text block: ' + ''.join(x)
for i in xrange(32):
# X^{r} = O_r (x_{r,1} ^ x_{r,2} ^ x_{r,3})
X_r = func_A(func_A(xor(xor(x[1], x[2]), x[3]), -1), 4)
# print 'X_r: ' + X_r
# X_{r,0} = P_r (x_{r,0})
X_r_0 = func_A(func_A(x[0], -3), 4)
# print 'X_r_0: ' + X_r_0
# get y_{r,1}... y_{r,8}
y = list(get_y(X_r))
# print 'y: ' + str(y)
new_x = reduce(xor, y, X_r_0)
x = x[1:] + [new_x]
print 'Round ' + str(i) + ': ' + ''.join(x)
r = r + 1
# Accumulate (x_{31,3}, x_{31,2}, x_{31,1}, x_{31,0})
cipher_text += reduce(lambda a, b: a + b, map(inverse, x[-1::-1]))
r = 0
print '----------------------------------------------------------------------'
print 'Cipher text: '
print cipher_text